Add "featured" field to Event model
Shorten the event description field
Add validation of image if an event is featured
Add featured events to main events page

Also requires the short description on a featured event, which must be
between 40 and 70 characters for now.
Add validations on short descriptions for events

Text is included to show how many characters are left before the minimum
is reached and how many can be added before reaching the maximum length.
Add resizing for featured event images
Merge branch 'master' into featured-events
Merge branch 'master' into featured-events

Conflicts:
	db/schema.rb
Fix new event form
Fix featured event blocks for consistent size
Enable client-side validation for featured events

The required description and image fields were only validated by the
server - this just adds a JS hook to let the browser handle the
validation instead.
Add GTV support for featured events

The "can_feature" flag was already in the request; the only change was
adding a filter for events that have the feature flag set.
Merge pull request #74 from rit-sse/featured-events

Featured events